SOLUTION: Please help me solve this equation: {{{ cos^2(x)+2sin(x)cos(x)-sin^2(x)=0 }}} with the range of x being between 0 and 2pi.

Question 1075991: Please help me solve this equation: with the range of x being between 0 and 2pi.
Answer by Edwin McCravy(20054) (Show Source): You can put this solution on YOUR website!





Use the formulas for twice an angle:

      
      





Divide both sides by cos(2x)







x is between 0 and 2p, but
2x is between 0 and 4p

so 

and taking half of all those:



Edwin

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